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IDS Forum

RE: PAM/LDAP Authentication

Posted By: Jim Cramer
Date: Thursday, 10 May 2007, at 4:18 p.m.

In Response To: Re: PAM/LDAP Authentication (Nilesh Ozarkar)

Hi again Nilesh,

Thanks for your continuing assistance.

Yes, my applications will supply the password and
connect stmt explictily.

Regarding your comment on 4gl not directly supporting PAM,
mentioned in the reference:
"# IBM Informix-4GL does not directly support PAM or LDAP authentication
because it has no mechanism for identifying callback functions. However, if
IBM Informix-4GL uses the correct version of CSDK, you can write C code that
can be called from IBM Informix-4GL to handle the challenge and response
protocol. To implement PAM, migrate to the new CSDK version, modify your
applications to register a callback that can handle challenges and
responses, and recompile your application.
# Products such as Informix SQL will not handle the challenge and response
protocol."

I think that this statement is worded too strongly and not entirely
correctly. It should be worded to indicate that 4gl does not support
PAM if you are using the Challenge PAM AUTH Mode. If you are using
simple password Pam mode and a PAM authentication module, such as
krb5 which sends no challenge and expects no response, then 4gl should
work just fine.

To make the code work in this case:

substitue the 4gl statement: DATABASE db_name

with the 4gl statement:
CONNECT TO db_name USER 'username'variable_with_username USING
variable_with_password

Let me know if you have questions.

Regards,

Jim

> -----Original Message-----
> From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On
> Behalf Of Nilesh Ozarkar
> Sent: Thursday, May 10, 2007 10:52 AM
> To: ids@iiug.org
> Subject: Re: PAM/LDAP Authentication [9117]
>
> I see that you are using PAM in password mode. When
> authentication mode is password, applications should supply
> password and connect explicitly.
> Implicit connections will be rejected with -1809 error.
>
> By the way, 4GL does not directly support PAM authentication.
> How to get it working ? check following link.
>
>
> http://publib.boulder.ibm.com/infocenter/idshelp/v111/index.js
> p?topic=/com.ibm.admin.doc/admin225.htm
>
> Regards,
>
> - Nilesh -
>
> ids-bounces@iiug.org wrote on 05/10/2007 06:39:22 AM:
>
> > Hi everybody,
> >
> > I'm implanted LDAP on RH AS 4.
> > Authentication on Red Hat is OK. I can do login successfully.
> >
> > May 10 12:32:09 server remote(pam_unix)[18227]: session opened for
> > user
> user1
> > by (uid=0)
> > May 10 12:32:09 server login - user1[18227]: LOGIN ON pts/5 BY user1
> FROM
> > pc_client
> >
> > By the other hand, I have an 4GL application in the box. My
> problem is
> when I
> > run the application and a program connects to the database,
> IDS send
> > the
>
> > error...
> >
> > server-user1:/usuarios/user1>FGLSERVER=ip client:5;export
> > FGLSERVER;FGLGUI=1;export FGLGUI; export DATABASE=dbname; menu4js;
> > Program stopped at 'evlogo4js.4gl', line number 132.
> > SQL statement error number -1809.
> > Server rejected the connection.
> >
> > .... and in /var/log/messages and informix.log isn't written any
> message.
> >
> > Then, I need running the application WITHOUT have to type login and
> password
> > when I connect to the database.
> >
> > I have validated some configurations, but the latest is the next:
> >
> > Sqlhosts
> > =======
> > on_oficinas onsoctcp server sqlturbo s=4, pam_serv=(passwd),
> > pamauth=(password)
> >
> > /etc/pam.d/passwd
> > ===============
> > auth required pam_stack.so service=system-auth account required
> > pam_stack.so service=system-auth password required pam_stack.so
> > service=system-auth
> >
> > Nothing message neither in /var/log/messages nor in informix.log.
> >
> > Thanks.
> >
> > P Antes de imprimir este correo, piensa si es necesario
> > ------------------------------------------
> > Alberto Otero (aotero@bancoetcheverria.es)
> > B|E Banco Etcheverría
> > Departamento de Sistemas
> > CL Real 76, 1º
> > 15003 La Coruña
> >
> > 981 220042 Ext. 122
> > 981 217523
> > ------------------------------------------
> >
> >
> >
>
> **************************************************************
> *****************
> > Forum Note: Use "Reply" to post a response in the discussion forum.
> >
>
>
> **************************************************************
> *****************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

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